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Preliminary Information
MT9075A
4-193
Page 0FH, addresses 10H to 1FH contain the 16 bytes of transmit message buffer zero
Page 10H, addresses 10H to 1FH contain the 16 bytes of transmit message buffer one
Receive Message Mode Buffer Zero and One (Pages 11H and 12H)
Pages 11H and 12H - Receive Message Buffer 0 and 1 respectively, contain 32 bytes of memory. Each byte is
updated once per frame by the equivalent PCM 30 channel from the receive data stream.
Page 11H, addresses 10H to 1FH contain the 16 bytes of receive message buffer zero
Page 12H, addresses 10H to 1FH contain the 16 bytes of receive message buffer one
Bit
Name
Functional Description
7 - 0
TxB0.n.7 -
TxB0.n.0
Transmit Bits 7 to 0. This byte is transmit on a time slot when selected by the
TXMSG bit of the appropriate per time slot control word. n = 0 to 15 and represents
transmit timeslot numbers 0 to 15.
Table 98 - Transmit Message Mode Buffer Zero (Page 0FH)
Bit
Name
Functional Description
7 - 0
TxB1.n.7 -
TxB1.n.0
Transmit Bits 7 to 0. This byte is transmit on a time slot when selected by the
TXMSG bit of the appropriate per time slot control word. n = 0 to 15 and represents
transmit timeslot numbers 16 to 31.
Table 99 - Transmit Message Mode Buffer One (Page 10H)
Page 0FH (Rx Message
Buffer 0) Address:
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Equivalent
Timeslots
PCM
30
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Page 10H (Rx Message
Buffer 1) Address:
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Equivalent
Timeslots
PCM
30
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Table 100 - Pages 11H & 12H Address Mapping to CEPT Channels
Bit
Name
Functional Description
7 - 0
RxB0.n.7 -
RxB0.n.0
Receive Bits 7 to 0. Each byte is sourced from a time slot coming from the line data.
n=0 to 15 represents receive timeslots 0 to 15.
Table 101 - Receive Message Buffer Zero (Page 11H)
Bit
Name
Functional Description
7 - 0
RxB1.n.7 -
RxB1.n.0
Receive Bits 7 to 0. Each byte is sourced from a time slot coming from the line data.
n=0 to 15 represents receive timeslots 16 to 31.
Table 102 - Receive Message Buffer One (Page 12H)